<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>自定义遍历数据</title>
</head>
<body>
    <script>
        //声明一个对象
        const banji = {
            name:'终极一班',
            stus:[
                'xiaoming',
                'xiaoning',
                'xiaotian',
                'Knight'
            ],
            [Symbol.iterator](){
                //索引变量
                let index = 0;
                return{
                    next:()=>{
                        if(index < this.stus.length){
                            const result = { value: this.stus[index],done:false};
                            //下标自增
                            index++;
                            //返回结果
                            return result;
                        }else{
                            return {value: undefined,done:true};
                        }
                    }
                }
            }
        }

        //遍历对象
        for(let v of banji){
            console.log(v);
        }
    </script>
</body>
</html>